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+% Copyright 2011 by Christophe Jorssen and Mark Wibrow
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details.
+%
+% $Id: pgflibraryluamath.code.tex,v 1.11 2012/03/06 16:06:09 cjorssen Exp $
+%
+% !!! Warning: this library does not work with fpu!!!
+
+% *******************************************************************
+% Some luatex stuff. Should be put elsewhere (e.g. in
+% pgfutil-luatex-engine).
+
+% We assume luatex version > 0.39:
+% - \directlua <general text> will work
+% - \directlua is the only luatex primitive that we can assume
+% accessible without being prefixed by the format via
+% tex.enableprimitives.
+% Ideas taken from the ifluatex package (Heiko Oberdiek)
+\let\pgfutil@ifluatex\iffalse
+\begingroup\expandafter\expandafter\expandafter\endgroup
+\expandafter\ifx\csname directlua\endcsname\relax
+\else
+ \expandafter\let\csname pgfutil@ifluatex\expandafter\endcsname
+ \csname iftrue\endcsname
+\fi
+
+\pgfutil@ifluatex
+ \let\pgfutil@directlua\directlua
+ \pgfutil@directlua{%
+ tex.enableprimitives('pgfutil@',{'luaescapestring'})}
+\else
+ \def\pgfutil@directlua#1{}
+ \def\pgfutil@luaescapestring#1{}
+\fi
+
+% End of luatex stuff
+% *******************************************************************
+
+% Loading part: based on fpu library
+
+\newif\ifpgfluamathcomputationactive
+\newif\ifpgfluamathparseractive
+
+\def\pgfluamath@makecomputationactive{%
+ \ifpgfluamathcomputationactive
+ \else
+ \pgfluamath@checkuninstallcmd%
+ \pgfluamath@install%
+ \pgfluamathcomputationactivetrue
+ \fi}
+
+\def\pgfluamath@makecomputationinactive{%
+ \ifpgfluamathcomputationactive
+ \pgfluamath@uninstall%
+ \pgfluamathcomputationactivefalse
+ \fi}
+
+\def\pgfluamath@makeparseractive{%
+ \ifpgfluamathparseractive
+ \else
+ \let\pgfluamath@pgfmathparse\pgfmathparse
+ \let\pgfmathparse\pgfluamathparse
+ \pgfluamathparseractivetrue
+ \fi}
+
+\def\pgfluamath@makeparserinactive{%
+ \ifpgfluamathparseractive
+ \let\pgfmathparse\pgfluamath@pgfmathparse
+ \pgfluamathparseractivefalse
+ \fi}
+
+\pgfqkeys{/pgf}{%
+ % Enable lua-side computation of \pgfmathresult
+ % (will be deactivated after the current TeX group)
+ luamath/.is choice,
+ luamath/only computation/.code={%
+ \pgfutil@ifluatex
+ \pgfluamath@makecomputationactive
+ \pgfluamath@makeparserinactive
+ \else
+ \pgfmath@error{Sorry, you need the luaTeX engine to use the
+ luamath library}%
+ \fi},
+ luamath/parser and computation/.code={%
+ \pgfutil@ifluatex
+ \pgfluamath@makecomputationactive
+ \pgfluamath@makeparseractive
+ \else
+ \pgfmath@error{Sorry, you need the luaTeX engine to use the
+ luamath library}%
+ \fi},
+ luamath/off/.code={%
+ \pgfluamath@makecomputationinactive
+ \pgfluamath@makeparserinactive},
+ luamath/.default=only computation}
+
+\def\pgfluamath@uninstall@appendcmd#1{%
+ \expandafter\gdef\expandafter\pgfluamath@uninstall\expandafter{%
+ \pgfluamath@uninstall #1}}
+
+% If the uninstall command is already assembled, it will skip the
+% uninstall assemblation.
+\def\pgfluamath@checkuninstallcmd{%
+ \pgfutil@ifundefined{pgfluamath@uninstall}{%
+ \pgfutil@directlua{%
+ pgfluamathfunctions = require("pgfluamath.functions")
+ pgfluamathparser = require("pgfluamath.parser")}
+ \global\let\pgfluamath@uninstall=\pgfutil@empty
+ }{%
+ % We already HAVE an uninstall command (prepared globally).
+ % So: don't waste time assembling one!
+ \def\pgfluamath@uninstall@appendcmd##1{}%
+ \def\pgfluamath@prepareuninstallcmd##1{}%
+ }%
+}
+
+% This assembles an uninstall command globally ON FIRST USAGE.
+% See \pgfmathfloat@plots@checkuninstallcmd
+\def\pgfluamath@prepareuninstallcmd#1{%
+ \expandafter\global\expandafter\let
+ \csname pgfluamath@backup@\string#1\endcsname=#1%
+ \expandafter\gdef\expandafter\pgfluamath@uninstall\expandafter{%
+ \pgfluamath@uninstall
+ \expandafter\let\expandafter#1\csname pgfluamath@backup@\string#1\endcsname}%
+}
+
+\def\pgfluamath@install@function#1=#2{%
+ \pgfluamath@prepareuninstallcmd{#1}%
+ \let#1=#2%
+}
+
+\def\pgfluamath@install{%
+ \pgfluamath@install@function\pgfmathadd@=\pgfluamathadd@%
+ \pgfluamath@install@function\pgfmathsubtract@=\pgfluamathsubtract@%
+ \pgfluamath@install@function\pgfmathneg@=\pgfluamathneg@%
+ \pgfluamath@install@function\pgfmathmultiply@=\pgfluamathmultiply@%
+ \pgfluamath@install@function\pgfmathdivide@=\pgfluamathdivide@%
+ % \pgfluamath@install@function\pgfmathdiv@=\pgfluamathdiv@%
+ \pgfluamath@install@function\pgfmathfactorial@=\pgfluamathfactorial@%
+ \pgfluamath@install@function\pgfmathsqrt@=\pgfluamathsqrt@%
+ % \pgfluamath@install@function\pgfmathpow@=\pgfluamathpow@%
+ \pgfluamath@install@function\pgfmathe@=\pgfluamathe@%
+ \pgfluamath@install@function\pgfmathexp@=\pgfluamathexp@%
+ \pgfluamath@install@function\pgfmathln@=\pgfluamathln@%
+ \pgfluamath@install@function\pgfmathlogten@=\pgfluamathlogten@%
+ % \pgfluamath@install@function\pgfmathlogtwo@=\pgfluamathlogtwo@%
+ \pgfluamath@install@function\pgfmathabs@=\pgfluamathabs@%
+ \pgfluamath@install@function\pgfmathmod@=\pgfluamathmod@%
+ \pgfluamath@install@function\pgfmathMod@=\pgfluamathMod@%
+ \pgfluamath@install@function\pgfmathround@=\pgfluamathround@%
+ \pgfluamath@install@function\pgfmathfloor@=\pgfluamathfloor@%
+ \pgfluamath@install@function\pgfmathceil@=\pgfluamathceil@%
+ % \pgfluamath@install@function\pgfmathint@=\pgfluamathint@%
+ % \pgfluamath@install@function\pgfmathfrac@=\pgfluamathfrac@%
+ % \pgfluamath@install@function\pgfmathreal@=\pgfluamathreal@%
+ \pgfluamath@install@function\pgfmathgcd@=\pgfluamathgcd@%
+ \pgfluamath@install@function\pgfmathisprime@=\pgfluamathisprime@%
+ \pgfluamath@install@function\pgfmathpi@=\pgfluamathpi@%
+ \pgfluamath@install@function\pgfmathrad@=\pgfluamathrad@%
+ \pgfluamath@install@function\pgfmathdeg@=\pgfluamathdeg@%
+ \pgfluamath@install@function\pgfmathsin@=\pgfluamathsin@%
+ \pgfluamath@install@function\pgfmathcos@=\pgfluamathcos@%
+ \pgfluamath@install@function\pgfmathtan@=\pgfluamathtan@%
+ \pgfluamath@install@function\pgfmathsec@=\pgfluamathsec@%
+ \pgfluamath@install@function\pgfmathcosec@=\pgfluamathcosec@%
+ \pgfluamath@install@function\pgfmathcot@=\pgfluamathcot@%
+ \pgfluamath@install@function\pgfmathasin@=\pgfluamathasin@%
+ \pgfluamath@install@function\pgfmathacos@=\pgfluamathacos@%
+ \pgfluamath@install@function\pgfmathatan@=\pgfluamathatan@%
+ \pgfluamath@install@function\pgfmathatantwo@=\pgfluamathatantwo@%
+ \pgfluamath@install@function\pgfmathmax@=\pgfluamathmax@%
+ \pgfluamath@install@function\pgfmathmin@=\pgfluamathmin@%
+ % \pgfluamath@install@function\pgfmath@pi=\pgfluamathpi@%
+ % \pgfluamath@install@function\pgfmathpi=\pgfluamathpi@%
+ % \pgfluamath@install@function\pgfmathe@=\pgfluamathe@%
+ % \pgfluamath@install@function\pgfmathe=\pgfluamathe@%
+ % \pgfluamath@install@function\pgfmathlessthan@=\pgfluamathlessthan@%
+ % \pgfluamath@install@function\pgfmathless@=\pgfluamathlessthan@%
+ % \pgfluamath@install@function\pgfmathgreaterthan@=\pgfluamathgreaterthan@%
+ % \pgfluamath@install@function\pgfmathgreater@=\pgfluamathgreaterthan@%
+ % \pgfluamath@install@function\pgfmathpow@=\pgfluamathpow@
+ \pgfluamath@install@function\pgfmathrand@=\pgfluamathrand@
+ \pgfluamath@install@function\pgfmathrand=\pgfluamathrand@
+ \pgfluamath@install@function\pgfmathrnd@=\pgfluamathrnd@
+ \pgfluamath@install@function\pgfmathrnd=\pgfluamathrnd@
+ % \pgfluamath@install@function\pgfmathtrue@=\pgfluamathtrue@
+ % \pgfluamath@install@function\pgfmathfalse@=\pgfluamathfalse@
+ % \pgfluamath@install@function\pgfmathnot@=\pgfluamathnot@
+ % \pgfluamath@install@function\pgfmathhex@=\pgfluamathhex@
+ % \pgfluamath@install@function\pgfmathHex@=\pgfluamathHex@
+ % \pgfluamath@install@function\pgfmathoct@=\pgfluamathoct@
+ % \pgfluamath@install@function\pgfmathbin@=\pgfluamathbin@
+ % \pgfluamath@install@function\pgfmathand@=\pgfluamathand@
+ % \pgfluamath@install@function\pgfmathor@=\pgfluamathor@
+ % \pgfluamath@install@function\pgfmathfactorial@=\pgfluamathfactorial@
+ % \pgfluamath@install@function\pgfmathveclen@=\pgfluamathveclen@
+ % \pgfluamath@install@function\pgfmathcosh@=\pgfluamathcosh@
+ % \pgfluamath@install@function\pgfmathsinh@=\pgfluamathsinh@
+ % \pgfluamath@install@function\pgfmathtanh@=\pgfluamathtanh@
+ % \pgfluamath@install@function@unimplemented{ceil}%
+ % \pgfluamath@install@function@unimplemented{frac}%
+ % \pgfluamath@install@function@unimplemented{log2}%
+ % \pgfluamath@install@function@unimplemented{log10}%
+ % \pgfluamath@install@function@unimplemented{equalto}%
+ % \pgfluamath@install@function@unimplemented{random}%
+ % \pgfluamath@install@function@unimplemented{setseed}%
+ % \pgfluamath@install@function@unimplemented{Mod}%
+ % \pgfluamath@install@function@unimplemented{real}%
+ % \pgfluamath@install@function@unimplemented{notequal}%
+ \pgfluamath@install@function\pgfmathreciprocal=\pgfluamathreciprocal%
+ \pgfluamath@install@function\pgfpointnormalised=\pgfluamathpointnormalised
+}
+
+\def\pgfluamathgetresult#1{%
+ \edef\pgfmathresult{\pgfutil@directlua{tex.print(-1,#1)}}}
+
+\def\pgfluamathpi@{%
+ \pgfluamathgetresult{pgfluamathfunctions.pi()}}
+\def\pgfluamathe@{%
+ \pgfluamathgetresult{pgfluamathfunctions.e()}}
+\def\pgfluamathadd@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.add(#1,#2)}}
+\def\pgfluamathsubtract@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.substract(#1,#2)}}
+\def\pgfluamathneg@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.neg(#1)}}
+\def\pgfluamathmultiply@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.multiply(#1,#2)}}
+\def\pgfluamathdivide@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.divide(#1,#2)}}
+\def\pgfluamathabs@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.abs(#1)}}
+\def\pgfluamathround@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.round(#1)}}
+\def\pgfluamathfloor@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.floor(#1)}}
+\def\pgfluamathceil@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.ceil(#1)}}
+\def\pgfluamathgcd@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.gcd(#1,#2)}}
+\def\pgfluamathisprime@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.isprime(#1)}}
+\def\pgfluamathmax@#1{%
+ \pgfluamathgetresult{%
+ math.max(pgfluamathfunctions.split_braces_to_explist("#1"))}}
+\def\pgfluamathmin@#1{%
+ \pgfluamathgetresult{%
+ math.min(pgfluamathfunctions.split_braces_to_explist("#1"))}}
+\def\pgfluamathsin@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.Sin(#1)}}
+\def\pgfluamathcos@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.Cos(#1)}}
+\def\pgfluamathtan@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.Tan(#1)}}
+\def\pgfluamathmod@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.mod(#1,#2)}}
+\def\pgfluamathMod@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.Mod(#1,#2)}}
+\def\pgfluamathrad@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.rad(#1)}}
+\def\pgfluamathdeg@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.deg(#1)}}
+\def\pgfluamathatan@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.aTan(#1)}}
+\def\pgfluamathatantwo@#1#2{%
+ \pgfluamathgetresult{pgfluamathfunctions.aTan2(#1,#2)}}
+\def\pgfluamathasin@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.aSin(#1)}}
+\def\pgfluamathacos@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.aCos(#1)}}
+\def\pgfluamathcot@#1{%
+ \pgfluamathgetresult{1/pgfluamathfunctions.Tan(#1)}}
+\def\pgfluamathsec@#1{%
+ \pgfluamathgetresult{1/pgfluamathfunctions.Cos(#1)}}
+\def\pgfluamathcosec@#1{%
+ \pgfluamathgetresult{1/pgfluamathfunctions.Sin(#1)}}
+\def\pgfluamathexp@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.exp(#1)}}
+\def\pgfluamathln@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.log(#1)}}
+\def\pgfluamathlogten@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.log10(#1)}}
+\def\pgfluamathsqrt@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.sqrt(#1)}}
+\def\pgfluamathrnd@{%
+ \pgfluamathgetresult{pgfluamathfunctions.rnd()}}
+\def\pgfluamathrand@{%
+ \pgfluamathgetresult{pgfluamathfunctions.rand(-1,1)}}
+\def\pgfluamathfactorial@#1{%
+ \pgfluamathgetresult{pgfluamathfunctions.factorial(#1)}}
+\def\pgfluamathreciprocal#1{%
+ \pgfluamathgetresult{1/#1}}
+% \pgfluamath@install@function\pgfmath@pi=\pgfluamathpi@%
+% \pgfluamath@install@function\pgfmathpi=\pgfluamathpi@%
+% \pgfluamath@install@function\pgfmathe@=\pgfluamathe@%
+% \pgfluamath@install@function\pgfmathe=\pgfluamathe@%
+% \pgfluamath@install@function\pgfmathlessthan@=\pgfluamathlessthan@%
+% \pgfluamath@install@function\pgfmathless@=\pgfluamathlessthan@%
+% \pgfluamath@install@function\pgfmathgreaterthan@=\pgfluamathgreaterthan@%
+% \pgfluamath@install@function\pgfmathgreater@=\pgfluamathgreaterthan@%
+% \pgfluamath@install@function\pgfmathpow@=\pgfluamathpow@
+% \pgfluamath@install@function\pgfmathrand@=\pgfluamathrand@
+% \pgfluamath@install@function\pgfmathrand=\pgfluamathrand@
+% \pgfluamath@install@function\pgfmathrnd@=\pgfluamathrnd@
+% \pgfluamath@install@function\pgfmathrnd=\pgfluamathrnd@
+% \pgfluamath@install@function\pgfmathtrue@=\pgfluamathtrue@
+% \pgfluamath@install@function\pgfmathfalse@=\pgfluamathfalse@
+% \pgfluamath@install@function\pgfmathnot@=\pgfluamathnot@
+% \pgfluamath@install@function\pgfmathhex@=\pgfluamathhex@
+% \pgfluamath@install@function\pgfmathHex@=\pgfluamathHex@
+% \pgfluamath@install@function\pgfmathoct@=\pgfluamathoct@
+% \pgfluamath@install@function\pgfmathbin@=\pgfluamathbin@
+% \pgfluamath@install@function\pgfmathand@=\pgfluamathand@
+% \pgfluamath@install@function\pgfmathor@=\pgfluamathor@
+% \pgfluamath@install@function\pgfmathfactorial@=\pgfluamathfactorial@
+% \pgfluamath@install@function\pgfmathveclen@=\pgfluamathveclen@
+% \pgfluamath@install@function\pgfmathcosh@=\pgfluamathcosh@
+% \pgfluamath@install@function\pgfmathsinh@=\pgfluamathsinh@
+% \pgfluamath@install@function\pgfmathtanh@=\pgfluamathtanh@
+
+\def\pgfluamathpointnormalised#1{%
+ \pgf@process{#1}%
+ \pgfutil@directlua{%
+ pgfluamathfunctions.pointnormalised(%
+ \pgf@sys@tonumber{\pgf@x},\pgf@sys@tonumber{\pgf@y})}%
+ \ignorespaces}
+
+% Parser
+
+\newif\ifpgfluamathunitsdeclared
+
+\def\pgfluamathparse#1{%
+ \pgfluamathunitsdeclaredfalse
+ % The following "two passes" (TeX -> lua -> TeX -> lua -> TeX) is
+ % required for chadef'ed named boxes. The parser
+ % adds \number in front of the box name (e.g. \mybox ->
+ % \number\mybox). Then this is expanded to the chardef'ed number via
+ % \edef expansion.
+ \edef\pgfluamath@temp{%
+ \pgfutil@directlua{%
+ % Double quotes " are needed here. On the lua side, single quotes
+ % ' are used. Take care to don't mix them.
+ pgfluamathparser.parse("\pgfutil@luaescapestring{#1}")
+ tex.sprint(parsed_expression)}}%
+ % We can now feed back the evaluator.
+ \edef\pgfluamathresult{%
+ \pgfutil@directlua{%
+ pgfluamathparser.eval('\pgfluamath@temp')
+ if pgfluamathparser.result == nil then
+ tex.print('nil')
+ else
+ tex.print(pgfluamathparser.result)
+ end}}%
+ \csname pgfluamathunitsdeclared\pgfutil@directlua{%
+ if pgfluamathparser.units_declared == true then
+ tex.print('true')
+ else
+ tex.print('false')
+ end}\endcsname
+ \ifpgfluamathparseractive
+ \let\pgfmathresult\pgfluamathresult
+ \let\ifpgfmathunitsdeclared=\ifpgfluamathunitsdeclared
+ \fi}
+
+\endinput
+% NEW: CJ (06 March 2012) Work in progress
+\documentclass{minimal}
+
+\usepackage{pgfmath}
+
+\makeatletter
+\let\pgfutil@directlua\directlua
+
+\directlua{dofile('pgfmathparser.lua')}
+
+\def\pgfluamathdeclarefunction#1#2#3{%
+ \pgfutil@directlua{%
+ pgfluamath.declare_new_function('#1',#2,#3)}}
+
+\pgfluamathdeclarefunction{add}{2}{%
+ function (a,b) return a + b end}
+
+\pgfluamathdeclarefunction{substract}{2}{%
+ function (a,b) return a - (b) end}
+
+\pgfluamathdeclarefunction{neg}{1}{%
+ function (a) return -(a) end}
+
+\pgfluamathdeclarefunction{multiply}{2}{%
+ function (a,b) return a * b end}
+
+\pgfluamathdeclarefunction{divide}{2}{%
+ function (a,b) return a / b end}
+
+\pgfluamathdeclarefunction{pow}{2}{%
+ function (a,b) return math.pow(a,b) end}
+
+\pgfluamathdeclarefunction{deg}{1}{%
+ function (a) return math.deg(a) end}
+
+\pgfluamathdeclarefunction{ifthenelse}{3}{%
+ function (a,b,c) if a == 1 then return b else return c end end}
+
+\pgfluamathdeclarefunction{equal}{2}{%
+ function (a,b) if a == b then return 1 else return 0 end end}
+
+\pgfluamathdeclarefunction{greater}{2}{%
+ function (a,b) if a > b then return 1 else return 0 end end}
+
+\pgfluamathdeclarefunction{less}{2}{%
+ function (a,b) if a < b then return 1 else return 0 end end}
+
+\pgfluamathdeclarefunction{notequal}{2}{%
+ function (a,b) if a < b or a > b then return 1 else return 0 end end}
+
+\pgfluamathdeclarefunction{notless}{2}{%
+ function (a,b) if a >= b then return 1 else return 0 end end}
+
+\pgfluamathdeclarefunction{notgreater}{2}{%
+ function (a,b) if a <= b then return 1 else return 0 end end}
+
+\pgfluamathdeclarefunction{andPGF}{2}{%
+ function (a,b) if (a < 0 or a > 0) and (b < 0 or b > 0) then return
+ 1 else return 0 end end}
+
+\pgfluamathdeclarefunction{orPGF}{2}{%
+ function (a,b) if (a < 0 or a > 0) or (b < 0 or b > 0) then return 1
+ else return 0 end end}
+
+\pgfluamathdeclarefunction{modulo}{2}{%
+ % This is the definition of the lua % modulo operator
+ % The % operator cannot be used here (catcode issue)
+ function (a,b) return a - math.floor(a/b)*b end}
+
+\pgfluamathdeclarefunction{int}{1}{%
+ function (a) return a - pgfluamath.defined_functions.modulo.code(a,1) end}
+
+\pgfluamathdeclarefunction{frac}{1}{%
+ function (a) return pgfluamath.defined_functions.modulo.code(a,1) end}
+
+\pgfluamathdeclarefunction{factorial}{1}{%
+ function (a)
+ a = math.abs(pgfluamath.defined_functions.int.code(a))
+ if a == 1 then
+ return 1
+ else
+ return a * pgfluamath.defined_functions.factorial.code(a-1)
+ end
+ end}
+
+\pgfluamathdeclarefunction{sqrt}{1}{%
+ function (a) return math.sqrt(a) end}
+
+
+
+\def\pgfluamathparseandresult#1{%
+ \pgfutil@directlua{%
+ local s = pgfluamath.transform_math_expr('#1',pgfluamath.defined_functions_pattern)
+ texio.write_nl('pgfluamath: parsed expression "' .. s .. '"')
+ loadstring('tex.sprint(-1,' .. s .. ')')()}}
+
+\makeatother
+\begin{document}
+
+$\pgfluamathparseandresult{1+2} = 3$
+
+$\pgfluamathparseandresult{2*3} = 6$
+
+$\pgfluamathparseandresult{1--1} = 2$
+
+$\pgfluamathparseandresult{6/2} = 3$
+
+$\pgfluamathparseandresult{2^2} = 4$
+
+$\pgfluamathparseandresult{1>2} = 0$
+
+$\pgfluamathparseandresult{2>1} = 1$
+
+$\pgfluamathparseandresult{1!=1} = 0$
+
+$\pgfluamathparseandresult{1?2:3} = 2$
+
+$\pgfluamathparseandresult{1.0||0} = 1$
+
+$\pgfluamathparseandresult{1&&0} = 0$
+
+$\pgfluamathparseandresult{sqrt(2)} = \pgfmathparse{sqrt(2)}\pgfmathresult$
+
+%\pgfluamathparseandresult{{1,{2,3-7}[1],4}[1]^2}
+
+\end{document}
+% Local Variables:
+% TeX-engine: luatex
+% End: \ No newline at end of file